<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <script src="../vue.js"></script>
</head>
<body>

</body>
</html>
<script>
  new Vue({
    data:{
      a:1
    },
    created:function(){
      console.log('a is'+this.a)
    }
  })
</script>